diff --git a/base/math.jl b/base/math.jl
index 0488d5530865c..3158e588723cb 100644
--- a/base/math.jl
+++ b/base/math.jl
@@ -393,6 +393,7 @@ function mod2pi(x::Int64)
   fx == x || throw(ArgumentError("Int64 argument to mod2pi is too large: $x"))
   mod2pi(fx)
 end
+@vectorize_1arg Number mod2pi
 
 # generic fallback; for number types, promotion.jl does promotion
 muladd(x,y,z) = x*y+z
diff --git a/test/mod2pi.jl b/test/mod2pi.jl
index e240bc0b47648..2ad86fdac1779 100644
--- a/test/mod2pi.jl
+++ b/test/mod2pi.jl
@@ -194,3 +194,4 @@ testModPi()
 @test_approx_eq mod2pi(355.0f0)     3.1416228f0
 @test mod2pi(Int64(2)^60) == mod2pi(2.0^60)
 @test_throws ArgumentError mod2pi(Int64(2)^60-1)
+@test_approx_eq maximum(abs(mod2pi(testCases[:,1]).-testCases[:,2])) 0.0